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fixing a scaling bug in the TrueType glyph loader that generated ugly

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artefacts when the TrueType bytecode interpreter was compiled in
This commit is contained in:
David Turner 2004-06-21 21:16:56 +00:00
parent c9cd80f6c1
commit 6dc94c4f22
3 changed files with 14 additions and 9 deletions
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9
ChangeLog
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@ -1,3 +1,10 @@
2004-06-21 David Turner <david@freetype.org>
* src/base/ftobjs.c: documentation fix
* src/truetype/ttgload.c: fixing a scaling bug that caused incorrect
rendering when the bytecode interpreter was enabled.
2004-06-14 Huw D M Davies <h.davies1@physics.ox.ac.uk>
* src/winfonts/winfnt.c (FNT_Face_Init): Set x_ppem and y_ppem
@ -16,7 +23,7 @@
2004-06-10 David Turner <david@freetype.org>
* src/base/ftobject.c, src/base/fthash.c, src/base/ftexcept.c,
src/base/ftsysio.c, src/base/ftsysmem.c, src/base/ftlist.c: Removed.
src/base/ftsysio.c, src/base/ftsysmem.c, src/base/ftlist.c: Removed.
Obsolete.
* src/raster/ftraster.c (Alignment, PAlignment): New union to fix

3
src/base/ftobjs.c
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@ -1999,7 +1999,7 @@
if ( char_height < 1 * 64 )
char_height = 1 * 64;
/* Compute pixel sizes in 26.6 units with rounding */
/* Compute pixel sizes in 26.6 units */
dim_x = ( char_width * horz_resolution + 36 ) / 72;
dim_y = ( char_height * vert_resolution + 36 ) / 72;
@ -2007,7 +2007,6 @@
FT_UShort x_ppem = (FT_UShort)( ( dim_x + 32 ) >> 6 );
FT_UShort y_ppem = (FT_UShort)( ( dim_y + 32 ) >> 6 );
if ( x_ppem == metrics->x_ppem && y_ppem == metrics->y_ppem )
return FT_Err_Ok;

11
src/truetype/ttgload.c
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@ -206,7 +206,7 @@
*tsb = face->os2.sTypoAscender;
*ah = face->os2.sTypoAscender - face->os2.sTypoDescender;
}
else
else
{
*tsb = face->horizontal.Ascender;
*ah = face->horizontal.Ascender - face->horizontal.Descender;
@ -778,9 +778,8 @@
{
FT_Vector* vec = zone->cur;
FT_Vector* limit = vec + n_points;
FT_Fixed x_scale = load->size->metrics.x_scale;
FT_Fixed y_scale = load->size->metrics.y_scale;
FT_Fixed x_scale = ((TT_Size)load->size)->metrics.x_scale;
FT_Fixed y_scale = ((TT_Size)load->size)->metrics.y_scale;
/* first scale the glyph points */
for ( ; vec < limit; vec++ )
@ -912,8 +911,8 @@
y_scale = 0x10000L;
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
x_scale = loader->size->metrics.x_scale;
y_scale = loader->size->metrics.y_scale;
x_scale = ((TT_Size)loader->size)->metrics.x_scale;
y_scale = ((TT_Size)loader->size)->metrics.y_scale;
}
/* get metrics, horizontal and vertical */